推荐回答(2个)
Global warming is a natural phenomenon. Because people burning of fossil mineral to generate energy or deforestation and its burning when the carbon dioxide produced and so on many kinds of greenhouse gases, because these greenhouse gases to radiation from the sun's highly visible through sex, and on the earth longwave radiation reflected highly resorptive, is also often say "greenhouse effect", the greenhouse gases called "greenhouse gases," they can let the sun shortwave radiation freedom through, simultaneously could absorb surface issued longwave radiation. These gases have a carbon dioxide and methane, CFC, ozone, of nitrogen oxide and water vapor etc, which are the main is carbon dioxide. In the past 100 years of global climate is gradually warming, meanwhile, the atmospheric concentration of greenhouse gases in content is also increased dramatically. Many scientists think, greenhouse gas emissions of the greenhouse aggravate that global warming is the basic reason.
Human burning coal, oil, natural gas and trees, producing a large amount of carbon dioxide and methane into the atmosphere after the earth warming, make the carbon cycle imbalances, changed the biosphere of earth energy conversion form. Since the industrial revolution, increased carbon dioxide in the atmosphere by 25%, far more than scientists may survey for the past 16 years out of all the historical record. Atmospheric carbon dioxide emissions caused by increase is the root of global warming. The international energy agency, the results of a survey shows that the United States, China, Russia and Japan's carbon dioxide emissions accounts for almost half of the global total. Surveys show that American carbon dioxide emissions, the highest in the world, annual per capita co2 emissions, 20 tons of carbon dioxide per cent of the global total 23.7%. China's annual per capita co2 emissions about calamitous close 251 tons, accounts for about higher of the global total.
Experts say you in the atmosphere of carbon dioxide in the atmosphere, survival time is 200 years, even if we now have reduced, you don't increase of words, it is to our influence will continue to 200 years. So global warming is irreversible, and now we can only how to adapt to it, and take measures to adapt to slow global warming.
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